WAVELAND, Miss. -- Gus McKay slides out of bed at dawn, tiptoes across his family's government-issued trailer and slips into the bathroom, slowly turning the doorknob so he doesn't wake his two teenage daughters in the adjoining room. He has only a few minutes to shower and dress before staking out his customary spot next to the kitchen sink. That's the safest place to be when his wife and daughters squeeze past, scrambling to get ready for work and school. Every morning is the same: The McKays wake up in shifts, rotate through the bathroom, bedroom and kitchen, take turns...